modified:   automaton.py
- "".join() useless in create_from_alphabet, now an alphabet is always
  an 1 or n length string
- handle one-length morphemes
modified:   create_3state_wfsa.py
- bugfix. if->elif
modified:   learner.py
removed one logging.info
modified:   automaton.py
probability_of_string_in_state changed to work with multiple emits
modified:   exp/exp01.py
- we don't need unigram_tuple_corpus anymore